package pack0618;

public class DemoJ {
    public static void main(String[] args) {
        int a =100;
        System.out.println("a="+a);
        a=200;
        System.out.println("a="+a);
        int b=a;
        System.out.println("b="+b);
        b=b+200;
        System.out.println("b="+b);
        System.out.println("a="+b);
    }
}
